1940s commercial receiver (T1618E)

This receiver was found in a Radio Electronics from 1949. It is a superheterodyne of the time using 6 tubes.

Decoder with the 4017 (CB4529E)
This circuit was obtained from an English magazine from 1979, but it can be easily assembled today...
Unijunction Oscillator (CB928E)
This is the normal circuit of a relaxation oscillator using an unijunction transistor such as the...
Nicad Charger (CB4788E)
This sophisticated NiCad battery charger was found in a 1990s Elektor. The components used are...